美国科学60秒 SSS 2013-03-08（在线收听）

 　　Don't forget to move your clocks forward this weekend and then don't forget to be more careful on the days after you adjust your clocks. Because 2009 study found the hour of the lost sleep was related to increase job related injuries. Probably because sleepy workers were less alert. Reseach published in the journal of applied psychology. Organizational behavior psychologists christal and david analyzed the reports filed with the national institute  for occupational safety and health about injuries that took place in minds.The study looked at all reports from 1993 to 2006. They found compare with other dates more injuries happen on the Monday after day light saving time went into effect and the injuries were more severe. Survey data found that people  sleep on average 40 minutes less on the Sunday night right after the time change.The data also revealed that on Monday after the switch to standard time when gain an hour of sleep there is no significant differences in sleep or injuries. So enjoy that extra hour of sunlight in the evening. Carefully.